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US 5,397,402 AGranted
Silicon steel strip having mechanically refined magnetic domain wall spacings and method for producing the same
AssigneeAllegheny Ludlum Corporation
InventorJames G. Benford
Life of this patent
Estimating the term…
Abstract
A grain oriented silicon steel strip and method are provided for producing the same wherein a chevron pattern of scribe lines mechanically refines the magnetic domain wall spacings. Multiple chevron patterns are formed to extend always transversely across the strip width.
Claims7
A method for improving core loss of grain-oriented silicon steel strip comprising the steps of:
- passing the strip between rotatable scribing and anvil roll means to cooperate together to impart mechanical scribing on one entire surface of the strip in a manner to obtain improved core loss,
- providing mechanical scribing by imparting local deformation in the strip by projections on the outer periphery of the scribing roll means, such that the scribing roll means scribes the steel with multiple chevron patterns of projections in closely spaced relation across the strip width with the apexes of the chevron pattern oriented in a plane transverse to the rotation axis of the scribing roll.
Dependencies are inferred from the claim text.